55015544 has 8 divisors (see below), whose sum is σ = 103154160. Its totient is φ = 27507768.

The previous prime is 55015529. The next prime is 55015547. The reversal of 55015544 is 44551055.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55015547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3438464 + ... + 3438479.

It is an arithmetic number, because the mean of its divisors is an integer number (12894270).

Almost surely, 2^55015544 is an apocalyptic number.

It is an amenable number.

55015544 is a deficient number, since it is larger than the sum of its proper divisors (48138616).

55015544 is a wasteful number, since it uses less digits than its factorization.

55015544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6876949 (or 6876945 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 55015544 is about 7417.2463893281. The cubic root of 55015544 is about 380.3310688186.

Adding to 55015544 its reverse (44551055), we get a palindrome (99566599).

The spelling of 55015544 in words is "fifty-five million, fifteen thousand, five hundred forty-four".